Entry into the religion is gradual and expensive, and it is by initiation. A newcomer is received in stages before the full initiation, the kariocha, also called the asiento, after which the initiate is a santero or santera, a priest of a particular orisha. Priesthood runs through the godparent relationship: an initiate belongs for life to the house of the godparent who initiated them, and there is no seminary, no central authority and no ordination beyond this.
This entry records that the rite exists and what standing it confers, and deliberately does not reproduce it. The preparatory stages, the seclusion and its length, the observances that follow it, and what is done and conferred within it are not set out here. Accounts have been published, some of them by people who received the material as initiates and printed it anyway, and the fact that they are in print is not evidence that anyone entitled to release them did so. This is the same rule the atlas applies to the kanzo of Haitian Vodou and to the initiation of the babalawo.
Three divination systems operate at different levels. Obi, the casting of four pieces of coconut, gives simple yes or no answers and is used constantly. The diloggun, sixteen cowrie shells cast by an initiated priest, produces figures that open onto a body of proverbs and stories comparable to the Odu of Ifa. Ifa itself is read only by babalawo, priests of Orunmila, a separate and traditionally male priesthood whose relationship to the santeros is cooperative and at times competitive; which system carries authority in which circumstance is genuinely disputed between houses.
Drumming ceremonies, called tambores or bembes, use consecrated bata drums to call the orisha, who mount initiates and address the congregation directly with advice, rebuke and blessing. Music and dance are not decoration. A specific sequence of rhythms belongs to each orisha and is part of how it is summoned.